Name
sem_destroy — destroy an unnamed semaphore
Synopsis
#include <semaphore.h>
int
sem_destroy( |
sem_t *sem); |
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Note |
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DESCRIPTION
sem_destroy() destroys the
unnamed semaphore at the address pointed to by sem.
Only a semaphore that has been initialized by sem_init(3) should be
destroyed using sem_destroy().
Destroying a semaphore that other processes or threads are currently blocked on (in sem_wait(3)) produces undefined behavior.
Using a semaphore that has been destroyed produces undefined results, until the semaphore has been reinitialized using sem_init(3).
RETURN VALUE
sem_destroy() returns 0 on
success; on error, −1 is returned, and errno is set to indicate the error.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
sem_destroy() |
Thread safety | MT-Safe |
NOTES
An unnamed semaphore should be destroyed with sem_destroy() before the memory in which it
is located is deallocated. Failure to do this can result in
resource leaks on some implementations.
COLOPHON
This page is part of release 4.07 of the Linux man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
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t Copyright (C) 2006 Michael Kerrisk <mtk.manpagesgmail.com> %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. %%%LICENSE_END |